I found that after posting too. My problem with NordicNames.de is that I find the site super unreliable, at least when it comes to Finnish names. They have a bunch of names they claim are "Finnish variant of X", when there's absolutely no proof that the name has been used by Finnish people, ever. So for me, if I find some information on NN.de, fine, but I'm not going to believe any of it before I find the same information somewhere else.